$ git clone -n https://src.fedoraproject.org/rpms/hexglass.git /var/lib/mock/f41-build-side-1-3050150-37963/root/chroot_tmpdir/scmroot/hexglass
Cloning into '/var/lib/mock/f41-build-side-1-3050150-37963/root/chroot_tmpdir/scmroot/hexglass'...
$ git fetch origin e97b225f987be7246d7eec3e4581c079f2d846aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hexglass
 * [new ref]         e97b225f987be7246d7eec3e4581c079f2d846aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e97b225 convert GPLv3+ license to SPDX